{"id":"CVE-2026-12530","aliases":["PYSEC-2026-2395"],"url":"https://o3.security/vulnerability/CVE-2026-12530","summary":"Improper neutralization of argument delimiters in AWS Bedrock AgentCore Python SDK install_packages()","details":"### Summary\nThe AWS Bedrock AgentCore Python SDK (bedrock-agentcore) is an open-source SDK that enables developers to build, deploy, and manage agents on AWS Bedrock AgentCore. An issue exists in the install_packages() method of the Code Interpreter client where crafted package name arguments can bypass input validation and allow a remote authenticated user to execute arbitrary commands within the Code Interpreter sandbox.\n\n\n### Impact\nThe install_packages() method constructs a 'pip install' shell command executed within the Code Interpreter sandbox using package name arguments provided by the caller. The method applied an incomplete blocklist that allowed crafted package name arguments - specifically pip flags such as '--index-url' and '-r' - to pass validation unchecked. A remote authenticated user who can influence the arguments passed to install_packages() could redirect package resolution to a third-party-controlled PyPI server, or expose the contents of arbitrary sandbox files and environment variables.\n\n**Impacted versions:** AWS Bedrock AgentCore Python SDK (bedrock-agentcore) versions >= 1.1.3 and < 1.6.1\n\n### Patches\nThis issue has been addressed in bedrock-agentcore version 1.6.1. We recommend upgrading to the latest version and ensuring any forked or derivative code is patched to incorporate the new fixes. \n\n### Workarounds\nIf you are unable to upgrade immediately, avoid passing any user-supplied or externally-influenced strings directly to install_packages(). Restrict calls to a fixed, hardcoded list of approved package names within your application code.\n\n### References\nIf you have any questions or comments about this advisory, we ask that you contact AWS Security via our [vulnerability reporting page](https://aws.amazon.com/security/vulnerability-reporting) or directly via email to [aws-security@amazon.com](mailto:aws-security@amazon.com). Please do not create a public GitHub issue.\n\n\nWe would like to thank Sergio Garcia for collaborating on this issue through the coordinated vulnerability disclosure process.","published":"2026-06-19T14:46:33Z","modified":"2026-07-13T16:43:19.937397447Z","cvss":{"score":7.3,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N"},"epss":{"score":0.00302,"percentile":0.22459,"asOf":"2026-08-10"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"PyPI","name":"bedrock-agentcore","fixedVersion":"1.6.1"}],"fix":null,"references":[{"type":"WEB","url":"https://github.com/aws/bedrock-agentcore-sdk-python/security/advisories/GHSA-6rfw-mq36-jm8h"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-12530"},{"type":"WEB","url":"https://aws.amazon.com/security/security-bulletins/2026-044-aws"},{"type":"PACKAGE","url":"https://github.com/aws/bedrock-agentcore-sdk-python"},{"type":"WEB","url":"https://pypi.org/project/bedrock-agentcore/1.6.1"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-07-13T16:43:19.937397447Z"}}